Shelter management to achieve "Four not reversed"

As the temperature gradually decreases, many vegetables are transferred into the greenhouse. At this time of the year, vegetable farmers often consult with the relevant knowledge about vegetable fertilization and management in greenhouses. Here, the author reminds everyone to pay attention to the management of shed vegetables. Not reversed."

Water-planting and transplanting colonization cannot be reversed

Many vegetable farmers are accustomed to spreading organic fertilizers in sheds first, then fertilizing chemical fertilizers, then ploughing, leveling and planting seedlings after planting, and then watering. This can easily make the roots of the vegetable seedlings and fertilizers contact, resulting in burning roots, water loss, or ammonia poisoning. If the water is first transplanted and then transplanted, the fertilizer will not easily produce gas damage after the water is dissolved and diluted, and it is not easy to cause water loss in the roots due to burning of roots.

Therefore, it is recommended that the first water stumbling, and then planting seedlings, and then use amino acid humic acid fertilizer irrigation root, pay attention to 7 to 10 days irrigation once, even irrigation 3 to 4 times. Farmers can also mix calcium superphosphate, calcium magnesium phosphate fertilizer and farmyard manure, and then apply it again, which is not only safe but also has good fertilizer effect.

The amount of phosphorus and potassium cannot be reversed

In the production process of fruits and vegetables, nitrogen is the key to plant formation. Phosphorus and potassium are the main elements of fruit formation. According to the relevant information, the ratio of phosphorus and potassium in the formation factors of melon vegetable production is 1:2 to 3, and the utilization rates are 20% to 30% and 50% to 70%, respectively. Therefore, in the process of fertilization, we must pay attention to the application of more potassium fertilizer, a reasonable allocation of nitrogen fertilizer, phosphate fertilizer, this is particularly important after sitting on fruits, love partial Shi DAP phenomenon must be avoided. Also, it is necessary to rationally apply biological fertilizers to regulate nutrient supply.

The order of pest control, nutrient regulation and watering cannot be reversed

If watering is in front and pest control and nutrient regulation are in the back, on the one hand, the plants are in excess of nutrient growth, reproductive growth is insufficient, the length of the internodes is light, the leaves are thin, the stalks are fine, and the heavy ones fall and fall; Due to the increased humidity in the shed after watering, the diseases such as Phytophthora, Pythium, Downy Mildew and other pathogens are prone to increase, resulting in aggravation of the disease. Therefore, it is necessary to use drugs to prevent diseases and pests, regulate growth potential with inhibitors, and then water and fertilize.

The principle of application of organic fertilizers and fertilizers cannot be reversed

First of all, organic fertilizers must be the mainstay, supplemented by chemical fertilizers.

Second, organic fertilizer must be cooked. The application of unripe organic fertilizers such as chicken manure, with a large number of salts and pests, such as sodium chloride, Phytophthora, nematode eggs, etc., to increase the difficulty and cost of pest control.

Viral Transportation Medium Tube

Uses: used for the detection and sampling of influenza, hand, mouth, foot and other epidemic diseases
Inspection principle:
The combination of multiple antibiotics has broad-spectrum antibacterial and antifungal effects;
As a protein stabilizer, bovine serum albumin can increase the survival time and infection stability of the virus;
Buffers such as Hank's build a neutral environment, which helps to increase the survival time and infection stability of the virus;
Phenol red is an acid-base indicator, the discoloration area is 6.6 (yellow)~8.0 (red), and it is red at 7.2~7.4.
Steps:
1. According to the sampling requirements, use a sampling swab to collect samples.
2. Place the swab after collecting the sample into a sterile sampling tube.
3. Break the sampling swab rod that is higher than the sterile sampling tube.
4. Tighten the cap of the sterile sampling tube.
5. Label the sterile sampling tube with information as required.

For sample collection, transportation and storage.
Product advantages:
1. The virus discretion of the flocking swab is high to ensure the accuracy of the test results.
2. The samples are well sealed to ensure product transportation and safe storage.
3. Product instruction manual, product certificate
Product Details:
1. The product set includes a one-time Virus Sampling Tube (including preservation solution), a self-sealing bag, a sampling swab, and instructions.
2. Product specification: 100 sets/box, 8 boxes/box 3. Product weight: 0. 65kg/box, 13. 2kg/box
4. Packing size: 25. 5*23. 5*14. 5 boxes, 53*49*32/carton
Scope of application:
Work resumption testing, the best choice for large-scale population screening
Features:
1. Transport at room temperature, stably preserve viral RNA
2. Pre-packaged guanidine salt lysate can inactivate the new coronavirus, ensuring the safety of transportation and testing personnel 3. The large-capacity preservation solution can fully soak the swab head,
The sample size can be divided into three parts for testing and reserve samples respectively to meet the testing needs.
Scope of application:
Suspected cases, disease control testing, preferred by P3 laboratory


Viral Transportation Medium Tube,Sample Collection Tubes,Transport Nasal Swab With Tube,Virus Sampling Tube Nasopharyngeal Swab

Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com